/*****************************************************************************

Copyright (c) 1995, 2021, Oracle and/or its affiliates.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License, version 2.0,
as published by the Free Software Foundation.

This program is also distributed with certain software (including
but not limited to OpenSSL) that is licensed under separate terms,
as designated in a particular file or component or in included license
documentation.  The authors of MySQL hereby grant you an additional
permission to link the program and your derivative works with the
separately licensed software that they have included with MySQL.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License, version 2.0, for more details.

You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA

*****************************************************************************/

/**************************************************//**
@file include/os0proc.h
The interface to the operating system
process control primitives

Created 9/30/1995 Heikki Tuuri
*******************************************************/

#ifndef os0proc_h
#define os0proc_h

#include "univ.i"

#ifdef UNIV_LINUX
#include <sys/ipc.h>
#include <sys/shm.h>
#endif

typedef void*			os_process_t;
typedef unsigned long int	os_process_id_t;

/** The total amount of memory currently allocated from the operating
system with os_mem_alloc_large(). */
extern ulint	os_total_large_mem_allocated;

/** Whether to use large pages in the buffer pool */
extern my_bool	os_use_large_pages;

/** Large page size. This may be a boot-time option on some platforms */
extern uint	os_large_page_size;

/** Converts the current process id to a number.
@return process id as a number */
ulint
os_proc_get_number(void);

/** Allocates large pages memory.
@param[in,out]	n	Number of bytes to allocate
@return allocated memory */
void*
os_mem_alloc_large(
	ulint*	n);

/** Frees large pages memory.
@param[in]	ptr	pointer returned by os_mem_alloc_large()
@param[in]	size	size returned by os_mem_alloc_large() */
void
os_mem_free_large(
	void	*ptr,
	ulint	size);

#ifndef UNIV_NONINL
#include "os0proc.ic"
#endif

#endif
